Knit Fabric Faults Causes And Remedies

Knitting

Knit fabric is produced from loop formation. So it needs to be careful during production. Different types of faults could be found in knit fabric, which could be the cause of fabric rejection. If we can find out the defects in the fabric during production, then we can take steps to remove them from the next knitting production process.

Knit Fabric Faults Causes And Remedies

Causes And Ways Of Remedies Of Knitting Faults

In practicality, the following knitting faults could be found in the knit fabric:

Hole Mark

Causes:

• During loop formation, the yarn breaks in the rejoin of the needle hook.
• Holes are the results of yarn breakage or yarn cracks.
• If the yarn count is not correct regarding structure, gauge, course, and density.
• Bad knots or splicing.
• Bad set of yarn feeders.

Needle Mark

Causes:

• When a needle breaks down, needle marks come along the fabric.
• If a needle or needle hook is slightly bent, then a needle mark comes on the fabric.

Star

Causes:

• Buckling of the needle latch.
• Yarn tension variation during production.
• Low GSM fabric production.

Sinker Mark

Causes:

• When the sinker corrodes due to abrasion, sometimes it cannot hold a new loop, and as a result, the sinker mark comes.
• If the sinker head bends, then the sinker mark comes.

Drop Stitches

Causes:

• If yarn is not properly fed during loop formation,.
• Use of defective needles.
• Too loose of a takedown mechanism.
• If yarn tension is insufficient,.
• If the yarn feeder is badly set.

Oil Stain

Cause:

• When oil licks through the needle trick, it passes on to the fabrics and makes a line.

Rush Stain

Cause:

• If any rush in the machine.

Pin Hole

Cause:

• A pin hole may come to the fabric due to the breakdown or bend of the latch.

Grease Stain

Causes:

• Improper greasing in the machine
• Greasing is excess.

Cloth Fall Out

Cause:

• Cloth fallout can occur after a drop stitch, especially when an empty needle with a close latch runs into the yarn feeder and removes the yarn from the hook of the following needles.

Barre

Causes:

• Yarn fault is responsible for this fault.
• If there is a there is a different micro-near value of fiber content in yarn,.
• Different luster and dye affinity of fiber content in yarn.
• During spinning, different similar classes of fiber are mixed, especially in carded yarn, and these fibers have similar characteristics.
• In a drawing frame, different similar classes of sliver are mixed to make one sliver.

Yarn Contamination

Causes:

• If yarn contains foreign fiber, then it remains in the fabric even after finishing.
• Lot mixing and count mixing are responsible for these faults.

Fly Dust

Cause:

• In the knitting section, too much lint or short fiber is flying to and fro that is created from yarn due to low twist as well as yarn friction. This lint may adhere to or be attached tightly to the fabric surface during knit fabric manufacturing.

Yarn Faults

Causes: Different yarn faults also cause knitting faults.

• Neps
• Slubs
• Yarn count variation
• Thick or thin places in yarn
• Hairiness

Now, if we want to remove these knitting faults, we should be aware before yarn selection and during the knitting of fabric. Knitting machine conditions should be perfect. The needle, sinker, feeder, and other equipment that is used should be fault-free.

So, management-related people should be aware of the causes of knitting faults and try to reduce them.